High performance hollow carbon@SnO 2 @graphene composite based on internal-external double protection strategy for lithium ion battery

Lu, Yonglai; Xue, Cong; Huang, Beibing; Xu, Ning; Guan, Rongfeng; Zhang, Qinfang; Zhang, Wenhui

doi:10.1016/j.electacta.2016.10.110

Cited by 29 publications

(20 citation statements)

References 47 publications

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“…Additionally, the formation of Li x Sn alloy can be verified from the existence of cathodic peaks at 0.17 V [Eq. (2)], [47] while the subsequent dealloying from Li x Sn to Sn gives rise to an oxidation peak at 0.64 V. Moreover, the reversible phase transition of Sn into SnO 2 is confirmed from the large oxidation peak at 1.3 V [48] . The overlapping and similar CV curves after the first scan imply the exceptional cycling stability of SnO 2 /WO 3 (8 : 2) during Li + insertion/extraction process.…”

Section: Resultsmentioning

confidence: 74%

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

et al. 2020

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Anodes derived from SnO2 offer a greater specific capacity comparative to graphitic carbon in lithium‐ion batteries (LIBs); hence, it is imperative to find a simple but effective approach for the fabrication of SnO2. The intelligent surfacing of transition metal oxides is one of the favorite strategies to dramatically boost cycling efficiency, and currently most work is primarily aimed at coating and/or compositing with carbon‐based materials. Such coating materials, however, face major challenges, including tedious processing and low capacity. This study successfully reports a new and simple WO3 coating to produce a core‐shell structure on the surface of SnO2. The empty space permitted natural expansion for the SnO2 nanostructures, retaining a higher specific capacity for over 100 cycles that did not appear in the pristine SnO2 without WO3 shell. Using WO3‐protected SnO2 nanoparticles as anode, a coin half‐cell battery was designed with Li‐foil as counter‐electrode. Furthermore, the anode was paired with commercial LiFePO4 as cathode for a coin‐type full cell and tested for lithium storage performance. The WO3 shell proved to be an effective and strong enhancer for both current rate and specific capacity of SnO2 nanoarchitectures; additionally, an enhancement of cyclic stability was achieved. The findings demonstrate that the WO3 can be used for the improvement of cyclic characteristics of other metal oxide materials as a new coating material.

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Section: Resultsmentioning

confidence: 74%

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

et al. 2020

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“…The high‐resolution spectrum of O 1s after fitting is exhibited in Figure d, there are five peaks at 530.5, 531.5, 532, 532.6, and 533.4 eV can be seen, which are related to SnO, CO, OH − , H 2 O, and CO bonds, separately. The peak at 530.5 eV with a much stronger intensity is mainly attributed to the SnO 2 in the C/SnO 2 (W) sample, while the peak at 532 and 532.6 eV are due to the adsorbed OH − groups and adsorbed oxygen species in the carbon layer …”

Section: Resultsmentioning

confidence: 97%

Large‐Scale Fabrication of Core–Shell Structured C/SnO₂ Hollow Spheres as Anode Materials with Improved Lithium Storage Performance

Cheng

Wang

et al. 2017

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Due to the high theoretical capacity as high as 1494 mAh g , SnO is considered as a potential anode material for high-capacity lithium-ion batteries (LIBs). Therefore, the simple but effective method focused on fabrication of SnO is imperative. To meet this, a facile and efficient strategy to fabricate core-shell structured C/SnO hollow spheres by a solvothermal method is reported. Herein, the solid and hollow structure as well as the carbon content can be controlled. Very importantly, high-yield C/SnO spheres can be produced by this method, which suggest potential business applications in LIBs field. Owing to the dual buffer effect of the carbon layer and hollow structures, the core-shell structured C/SnO hollow spheres deliver a high reversible discharge capacity of 1007 mAh g at a current density of 100 mA g after 300 cycles and a superior discharge capacity of 915 mAh g at 500 mA g after 500 cycles. Even at a high current density of 1 and 2 A g , the core-shell structured C/SnO hollow spheres electrode still exhibits excellent discharge capacity in the long life cycles. Consideration of the superior performance and high yield, the core-shell structured C/SnO hollow spheres are of great interest for the next-generation LIBs.

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“…Each terminal disturbs its original data stream and sends it to the base station. The base station summarizes the disturbance data coming from each terminal and integrates it into an aggregate data set for subsequent data mining work [28].…”

Section: Random Interference Technologymentioning

confidence: 99%

Research on wireless distributed financial risk data stream mining based on dual privacy protection

Zhao

2020

J Wireless Com Network

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With the advancement of network technology and large-scale computing, distributed data streams have been widely used in the application of financial risk analysis. However, while data mining reveals financial models, it also increasingly poses a threat to privacy. Therefore, how to prevent privacy leakage during the efficient mining process poses new challenges to the data mining technology. This article is mainly aimed at the current privacy data leakage in financial data mining, combined with existing data mining technology to study data mining and privacy protection. First, a data mining model for dual privacy protection is defined, which can better meet the characteristics of distributed data streams while achieving privacy protection effects. Secondly, a privacy-oriented data stream mining algorithm is proposed, which uses random interference technology to effectively protect the original sensitive data. Finally, the analysis and discussion of the algorithm in this paper through simulation experiments show that the algorithm is feasible and effective, and can better adapt to the distributed data flow distribution and dynamic characteristics, while achieving better privacy protection effects, effectively reduced communication load.

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High performance hollow carbon@SnO 2 @graphene composite based on internal-external double protection strategy for lithium ion battery

Cited by 29 publications

References 47 publications

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

Large‐Scale Fabrication of Core–Shell Structured C/SnO₂ Hollow Spheres as Anode Materials with Improved Lithium Storage Performance

Research on wireless distributed financial risk data stream mining based on dual privacy protection

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High performance hollow carbon@SnO 2 @graphene composite based on internal-external double protection strategy for lithium ion battery

Cited by 29 publications

References 47 publications

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO3‐Protected SnO2 Core‐Shell Nanoarchitectures

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO3‐Protected SnO2 Core‐Shell Nanoarchitectures

Large‐Scale Fabrication of Core–Shell Structured C/SnO2 Hollow Spheres as Anode Materials with Improved Lithium Storage Performance

Research on wireless distributed financial risk data stream mining based on dual privacy protection

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Product

Resources

About

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO₃‐Protected SnO₂ Core‐Shell Nanoarchitectures

Large‐Scale Fabrication of Core–Shell Structured C/SnO₂ Hollow Spheres as Anode Materials with Improved Lithium Storage Performance